Creating controller manager from config string in audio network adaptor.

webrtc/modules/audio_coding/audio_network_adaptor/frame_length_controller.h

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 16 matching lines @@
     Config(const std::vector<int>& encoder_frame_lengths_ms,
            int initial_frame_length_ms,
            float fl_increasing_packet_loss_fraction,
            float fl_decreasing_packet_loss_fraction,
            int fl_20ms_to_60ms_bandwidth_bps,
            int fl_60ms_to_20ms_bandwidth_bps);
     Config(const Config& other);
     ~Config();
     std::vector<int> encoder_frame_lengths_ms;
     int initial_frame_length_ms;
+    // Uplink packet loss fraction below which frame length can increase.
     float fl_increasing_packet_loss_fraction;
+    // Uplink packet loss fraction below which frame length should decrease.
     float fl_decreasing_packet_loss_fraction;
+    // Uplink bandwidth below which frame length can switch from 20ms to 60ms.
     int fl_20ms_to_60ms_bandwidth_bps;
+    // Uplink bandwidth above which frame length should switch from 60ms to
+    // 20ms.
     int fl_60ms_to_20ms_bandwidth_bps;
   };
 
   explicit FrameLengthController(const Config& config);
 
   ~FrameLengthController() override;
 
   void MakeDecision(const NetworkMetrics& metrics,
                     AudioNetworkAdaptor::EncoderRuntimeConfig* config) override;
 
@@ skipping 28 matching lines @@
   std::vector<int>::iterator frame_length_ms_;
 
   std::map<FrameLengthChange, int> frame_length_change_criteria_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(FrameLengthController);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_CODING_AUDIO_NETWORK_ADAPTOR_FRAME_LENGTH_CONTROLLER_H_